MGS MOC Release No. MOC2-553, 23 November 2003 Iberus Vallis is a trough system located radial to and southeast of the martian volcano, Elysium Mons. This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image, acquired in October 2003, shows some of the valleys of this region; they are cut into what is presumably (at least near the top) volcanic rock. The dark dots and specks on the valley floors are large boulders that have been shed from the slopes. This picture is located near 21.6N, 208.3W. The image shows an area 3 km (1.9 mi) wide, and is illuminated by sunlight from the lower left.